Sound-box



W. C. KANTNER.

SOUND BOX. APPLICATION FILED NOVJIQ, 1920.

Patented Oct. 18, 1921.

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ill-l! atroz ma t it f sound boit new in use which is provi WASHINGTONC. KANTNER, OF READING, Il?ENNSYLVANIAn SOUND-BOX.

Specification of Letters Patent.

Patented Oct. 18, 1921.

pplication led November 19, 1920. SerialNo. 425,187.

To all w/wm t may concern:

Be it known that I, WASHINGTON C. KANTNER, a citizen of the UnitedStates, residin at Reading, in the county of Berks and tate ofPennsylvania, have invented certain new and useful .Improvements inSound-Boxes, of which the following is a specification, reference beinghad therein to the accompanying drawing.

This invention relates to sound boxes for sound 'reproducing machinesand is in the nature of an improvement on my a plication for sound boxiled June 25,- 1920, erial No. 391,573, the object being to improve thegeneral construction of the same in order that the box can bemanufactured very cheaply.

A further object of the invention is to provide a. sound boX which is soconstructed that the ordinary sound box now in use on sound reproducingmachines can be used in building up a sound box'constructed inaccordance with my invention.

Another and further object of the invention is to provide a sound` boxin which a plurality of. spaced disks are employed arranged within a lidlike member, said member and disk being provided with centrally disposedopenings 1n such a manner that the Waves produced by the vibratorydiaphragm are broken up before they are transmitted to the horn of thesound reproducing machine. f

Other and |further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

In the drawings,

Figure 1 is a longitudinal section through a sound box constructed inaccordancewith my invention;

Fig. 2 is an enlarged section taken on line 2 2 of Fig. 1; and

Fig. 3 is a` plan view the disk.,

In the drawings i indicates a .cylindricai sound box ci the ordin myconstruction not-v in use liavii'nn a mica diaphragm. 2 between rubberwashers 3 and et and pro vided with a needle bar 5 connected to a naryconstruction now in use. -e above construction terms one part oi an or ia piate i a tubuiar outlet s nested to the horn in the rdm-a y ramer,

the plate being secures, to the by screws 9 which are screwed intothreaded sockets 10;

In carrying out mty/invention I empio a cylindricalcup Shaped member 11pre er-` to one face thereof for holding the disksl spaced, a art asclearly shown in Fig. 1, these dis s being secured Atogether by glue,

the lar er disk 13 having its spacing strips,

secure to the ,bottom ofthe cup vshaped member 11. The cu shaped memberwith the ber disks are p aced between the plate 7 and thecylindrical'sound box 1 with the edge of the cup shaped member againstthe washer 3 and the screws 9 are then placed in position so as tosecure the members together and by this construction in order to producea sound box in accordance with my invention, it is only necessary toemploy longer screws 9 than those originally employed in the "sound boxof the ordinary construction now in use.

In the drawing I have Shown the screws 17 employed for holding thetubular outlet 8 in position on the plate 7 passing into the bottom ofthe cup like member 1l for securing the salne,gbut it is .of courseunderstood that this is not essential as bypositioning the cup likemember between the plate 7 and cylindrical member 1 and tightenin thescrews, it 4will be firmly hel'd in position. Y

In building up the intermediate portion of the sound box constructed asshown inthe drawing I iirst glue to each of the iiber disks i3, i/g andl5 spacing strips 1c and it will be noted `timt these disks are providedwith openings ot eine corresponding to the size t opening formed in thecup shaped member 1l. then cover the outer `faces of the lspacing ipswith glue and put the ger strip on the bottom olif* the cup 4, edinember11 and then buildy up the disks one upon another, ,ositio'ning same sothe ope wilv all be in aiinement. "ght is then 'placed the thesamealldwed to s hardened. This `vodnces ich can be readiiy Hearted.construction ont sound bor:

i the g an attachmer ordmai 'the sound Waves produced by the vibratorydiaphragm are broken up before they are transmitted to the horn andwhile I haver described the use of fiber disks, of course, I do not wishto limit myself as other material could'be employed for-'producing thedisks and cup like member without departingvfom the spirit of myinvention.

1. A sound box having a vibratory diaphragm at one end and a plate atthe other end provided with an 'outlet and a cup like member having aplurality of spaced disks arranged between said sound box and plate,said disks and cup like member being provided with openings registeringwith the outlet opening of said plate.

2. A sound box for reproducing machines having a vibratory diaphragm atone end and an outlet at the other end and a cup like spaced apertureddisks arranged within scid cup like member.

4. A sound box for sound reproducing machines comprising a cylindricalsound box having a vibratory diaphragm disposed between washers, a fibercup shaped member having its edge seated on the outer washer v of saidvibratory diaphragm, a plate prol vided with a centrally disposed outletar- 5. A sound box for sound reproducing machines comprisingacylindrical sound box having a vibratory diaphragm at one end disposedbetween rubber washers, a centrally apertured fiber cup shaped memberhavin its edge seated on the outer washer of sai vibratory diaphragm, aplate arranged against the bottom of said cup shaped member having acentrally disposed outlet, screws extending through said plate intosockets formed in said cylindrical sound box for securing ysaid'memberstogether, said cup shaped member having a plurality of disks ofdifferent sizes disposed thereink and spaced apart by radial spacingstrips, said disks being provided with centrally disposed openingsregistering with the opening in the bottom ofthe cup-shaped member.

Intestimony whereof I hereunto affix-my signature.

WASHINGTON C. KANTNER.

